<template>
 <router-view></router-view>
</template>

<script>
export default {
  created() {
    //在页面加载时读取sessionStorage里的状态信息
      if (sessionStorage.getItem("store")) {
      this.$store.replaceState(
        Object.assign(
          {},
          this.$store.state,
          JSON.parse(sessionStorage.getItem("store"))
        )
      );
    }
    //在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener("beforeunload", () => {
      sessionStorage.setItem("store", "");
      sessionStorage.setItem("store", JSON.stringify(this.$store.state));
    });
  }
}
</script>


<style lang="less" scoped>

</style>
